Signed-off-by: Alexey Gladkov <gladkov.ale...@gmail.com>
---
 Documentation/filesystems/proc.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/filesystems/proc.rst 
b/Documentation/filesystems/proc.rst
index e2ecf248feb5..68acd335cd8c 100644
--- a/Documentation/filesystems/proc.rst
+++ b/Documentation/filesystems/proc.rst
@@ -2177,6 +2177,12 @@ information about processes information, just add identd 
to this group.
 subset=pid hides all top level files and directories in the procfs that
 are not related to tasks.
 
+subset=NAME[:NAME...] allows to give access to the listed file names or
+directories located at the top level of procfs. These files and directories
+do not have to be present at the time of mounting procfs. They may appear later
+when the kernel module that creates them loads. The list of names can be
+combined with subst=pid.
+
 5      Filesystem behavior
 ----------------------------
 
-- 
2.25.4

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